For many reasons, this beautiful son of yours sometimes appeared previously as the son of Vasudeva. Therefore, those who are learned sometimes call this child Vāsudeva.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
प्रागयं वसुदेवस्य क्वचिज्जातस्तवात्मजः । वासुदेव इति श्रीमानभिज्ञाः सम्प्रचक्षते
prāgayaṃ vasudevasya kvacijjātastavātmajaḥ | vāsudeva iti śrīmānabhijñāḥ sampracakṣate
SB 10.8.14